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1936- I H. A. THRUSH Re. 19,873

HOT WATS?! EEATIYG SYSTEM Original Filed Jan'. 26, 1953 I5 Sheets-Sheet 1 llLl/ HamerATfaq/z Feb. 25, 1936. H. A. THRUSH 19,873

HOT WATER HEATING SYSTEM Original Filed Jab. 26. 19:53 .3 Sheets-Sheet 2 m w //\\N R I 3 3 l I m m m a ti" R HomerATlzruah.

Feb. 25, 1936.

H. A. THRUSH HOT WA ER HEATING SYSTEM Original Filed Jan. 26. 1933 3. Sheets-Sheet 3 Homer/1. T/zma/z I Reissued Feb. 25, 1936 UNITED STATES HomerAJlhrush,

Indiana 8 tion for reissue 45,308

This invention relates tohot water heating systems and particularly to heating systems in which water for domestic use is heated in connection with or independent of the heating of the house or oflice.

The object of the invention is to provide a heating system having automatic controls for cutting oil circulation thmugh the main heating wstem when the temperature of the room reaches proper degree and at the same time using the heating system to more rapidly heat the water for domestic use.

. A further object is to provide a system of controls for fuel to the main heating system in response to the demands both upon the heating system and the hot water supply.

Further objects and advantages will become apparent from the description which follows:

Referring to the accompanying drawings,

ilar reference characters indicate similar parts,

tem having automatic furnace fuel feed and having my invention incorporated therein,

Figure 2, a sectional view of a valve forming a part of the system,

I Figure 3, a side elevation of a hand feed furnace for a heating system having my invention incorporated therein.

In the drawings numeral Ill indicates a hot water boiler of any suitable and conventional construction. In the form shown the boiler is fuel is fed to the furnace from a hopper ll through a feed tube II. A motor for operating the fuel feed is operated by current supplied through lines It and it, this circuit to the motor being controlled by a thermostatic switch I! which is operated in response to changes of temperature of the water within the boiler it. Hot water is supplied from the boiler Ill through a pipe l6, pipe 3 I, a manifold i1 and through lateral pipes II which enter radiators I9.' Water is returned from the radiators by manifold 20 and pipe 2| entering-the lower portion of the boiler. Forced circulation of water through the radiators is effected by means of a pump 22, operated by motor 23, current being supplied to the motor controlled by a thermostatic switch 26 located in A vent pressure tank 21 is connected by means of pipe 28 to a port 29 invalve casing Ill. Steam or air which might tend ccumulate in chamber 32 of the valve will .11 Claims. (01- 287-68) which are made a part hereof and on which sim- Figure 1 is a side elevation of a heating sysheated by an automatic stoker by means of which through lines It and 25. Circuit to the motor is through pipe 2' to the tank 21 where the PATENT OFFICE HOT WATER- HIA'IING SYSTEM mlndqamignortolA. Thrush (lo-.Pern,

lnd aoorporationof Original No. 1,931,419, dated October 17, 1933,

Serial No. 658,723, January 26, 1988. Applica- 12, 1935. Serial No.

steam will condense. This prevents gaseous presbeneath the closure plate ll and prevents eofwarmgasfrompassingintotheradiators. The valve II is placed between the pipe ll andthepipefl. Thevalve flisdividedinto inlet and outlet chambers, and It by means of a weighted valve 34. I'his valve is hinged at it to the side of the valve casing. A plug 88 is screw threaded through a side of .the casing and may be adjusted to cuss! the hinged portion 31 of the valve to hold the valve on its seat. A cap 38 is screwed upon a portion of the valve casing enclosing the screw II. A similar plug 68 is threaded through the valve casing and maybe screwed in to engage alug I! on thehinged portion 31 to hold the valve open. An opening in the valve casing is closed by a removable plug. The pipe II is preferably threaded into-a cap 40 which is of the hot water boiler II, circulation of water from the boiler Ill through the tank ll being controlled by valves 44 and I. The tankll is connected by pipes 46 and 41 with a hot water storage tank;

In operation when the heating system for the house is in operation hot water from the boiler III is circulated through pipes l6 and I] to the radiators i9 and returned through P p s 2. and ii to the boiler 10. This circulation is produced bymeansofthe pump. Thispumpwillbein operation so long as the temperattn'e in the room is below a predetermined degree. when the temperature rises sufiiciently to open thermostat switch 36, circuit to the motor 23 is broken and the pump 22 is stopped. When this occurs the weight of the valve 34 will close communication between the chambers and a and prevent gravity circulation of the fluid through the system. The purpose of the pump 22 is to give suihcient pressure head to the water to force the circulation of the liquid through the system against the weight of valve 34. So long as water is being circulated through the radiators the temperature of the water in'the boiler II will be kept at a fairly low degree since the water is giving up ts heat to the radiators which in turn give it upto the rooms which are being heated. As soon as the pump 22 is stopped and circulation of water through the radiators is stopped the loss of heat from the water is reduced so that water in the tank I is heated much faster. As long as the temperature of the water within the boiler III is below a predetermined degree the switch I will remain closed so that the fuel feed to the boiler continues. When the water in the boiler Ili rises above a predetermined temperature, thermostat switch I5 is opened so that circuit through the lines I 3 and I4 is interrupted so that the automatic stoker is stopped.

From the foregoing description it will be apparent that the system will be automatically operated to maintain a predetermined temperature within the rooms to be heated and that water for domestic use will be. maintained at the desired temperature and that there will always be an ample supply of hot water. The system moreover prevents any lost energy in that the water in the hot water tank as well as that inthe radiators will never go beyondapredetermined desired temperature. The system therefore will operate without 1 due to overheating either of the domestic water supply or of the radiators forming a part of the heating system.

In the summer it will be desirable to prevent any circulation of water through the radiators. The screw 36 may be turned down to engage the latch 31 so as to hold the valve 34 upon its seat. This will prevent any circulation of water through the radiators. The boiler Ill may then operate to heat the auxiliary hot water tank M. The fuel feed will be operated inresponse to temperature changes as before so that there will be no lost energy or surplus heating since the temperature of the water in the boiler It! will be controlled and kept within predetermined limits. The plug 58 may be screwed in to lift the valve and hold it open. When in this position water may circulate freely by gravity without assistance from-pum In the modified form shown in Figure 3 a ban fed furnace is shown. In this form 48 is the boiler and furnace having a water return pipe 49 from the radiators and a supply line 50 to the radiators, these pipes being connected to manifolds 5| and 52 respectively, which lead to radiators, the radiators not being shown. The valve 30, shown in Fig. 2, is placed between the outlet pipe 50 and the manifold 52. Apump 54 operated by electric motor 55 circulates water to and from the radiators. The motor 55 is operated by current supplied through lines 56 and 51, circuit being closed by means of a thermostat switch 58. The hot water heating tank is shown at 59. The water in this tank is heated by hot water which is circulated through the tank from the boiler 48, circulation taking place through pipes 59 and 61 which are connected respectively to the lower portion of the boiler 48 and preferably to the top of this boiler. The pipes 61 and 50 communicate through a pipe 62 with the tank 53. The water to be heated is supplied to and drawn from the indirect heating tank 59 through pipes 64 and 55, respectively. A thermostat 66 operates a damper through a chain 61.

In operation water to the radiators is circulated by means of the pump 54. This builds up a. pressure head having a sufficient force to deliver water through the valve- 53 into the supply manifold 52 to the radiators. When the pump 54 is stopped gravity circulation of the heating fluid also stops. This causes the temperature of the water in boiler 49 to rise so that the water is circulated more rapidly through the tank 59 to heat the water in this tank more rapidly. Operation of the pump 54 is controlled by power lines 55 and the radiators are placed rises above a predeter- .crease heating of the water by the indirect heatmeans for forcibly circulating water through said 51. when the temperature of the roomin which mined degree, the switch 58 is opened so as to stop operation of' the motor and pump 55 and 54. Thermostat 56 provides means for closing the 5 draft to the boiler 49.50 as to make this type of heater also partially automatic in operation. In any case circulation of the hot water through the radiators is controlled automatically so as to prevent the radiators from being heated to too high a temperature and cutting of! circulation of fluid to the radiators automatically acts to ining system in the tank 59.

While I have shown the invention as applied to a hand fired furnace and a stoker in which coal is used as fuel, the invention is in no sense limited to the use of hard fuel. The invention is equally applicable to furnaces in which oil or gas is used as fuel- It will be obvious to those skilled in the art that various changes may be made in my device without departing from the spirit of the invention and therefore I do not limit myself to what is shown in the drawings and described in the specification, but only as indicated by the appended claims.

By reference to the vent being anterior to the valve is meant that the vent is ahead of the valve in the direction of flow from the boiler in the circulating system.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a hot water heating system the combinatiorr witha radiator of a boiler having a supply line and a return line to and from the radiator, means for forcibly circulating water through said lines, a check valve in the supply lineloaded to resist circulation of the water but permitting a forced circulation thereof, an air tank and a connection on the inlet side of said valve to said tank for permitting gas' to vent to the said tank when said valve is closed thereby preventing circulation of warm fluid through the valve into the a radiator.

2. In a hot water heating system the combination with a radiator of a boiler having a supply line and a return line to and from the radiator,

lines, a check valve in the supply line loaded to resist circulation of the water but permitting forced circulation thereof, an air tank and a connection on the inlet side of said valve to said tank for permitting gas to vent to the said tank when said valve is closed therebypreventing circulation of warm fluid through the valve into the radiator, and means for holding said valve closed to prevent circulation of water to the radiator.

3. In a hot water heating system the combination with a radiator of a boiler having a supply line and a return line to and from the radiator, means for forcibly circulating water through said lines, a check valve in the supply line loaded to resist circulation of the water but permitting forced circulation thereof an air tank and a connection on the inlet side of said valve to said tank for permitting gas to vent to the said tank when said valve is closed thereby preventing circulation of warm fluid through the valve into th radiator, and means for holding said valve ope to permit unrestricted circulation of water to th radiator.

4. In a. hot water heating system having boiler, a plurality of radiators, a fluid supply fromsaidboilertosaidradiatorsandantmn linefromtheradiatorstotheboilenmeansfor forcibly circulating fluid through mid lines. a valve in said supply line divided into anlnlet and an outlet chamber, a loaded valve controlling passage of fluid from the inlet to the outlet chamber, a port in said valve communicating a pipe connecting said portawith said air pressure 5. In a hot water heating system, a boiler, a plurality of radiators, fluid conduits from said boiler to said radiators and from the radiators back to the boiler,- a pump for-forcing circulation from the radiators through the boiler and back to the radiators, a valve in the supply line to the radiators having a plurality of ports, one connected to the boiler, another connected to the radiator, a partition in the valve casing between said ports, a valve seat in said partition, a weighted valve ,movable toward and from said side of the valve and adjacent said partition. on air. pressure tank, a pipe connecting said air pressure tank with the said third port to permit air and other gases to pass from the inlet side of said valve to the said tank to prevent passing into the radiators.

6. In a hot water heating system the combination with a radiator of a boiler having a supply line and a return line to and from the'radiator, means for forcibly circulating water through said lines, a valve in the supply'line loaded to resist circulation of the water but permitting vent on its inlet'side for permitting gas to escape when said valve is closed thereby preventing cirradiator.

7. In a hot water heating system-the comsupply line and a return line to and from the radiator, means for forcibly circulating water through said lines, a valve in the supply line loaded to resist circulation of the water but permittlng forced circulation thereof, said valve having a vent on its inlet side for'permitting gas to escape when said valve is closed thereby preventing circulation of iyarm fluid through the valve into the radiator, and means for holding d valve closed to prevent circulation of water the radiator.

8. In a hot water heating'system the combinawith the inlet chamber. an air presure tank and seat, athird port in the valve casing on the inlet their v forced circulation thereof. said valve having a tion with a radiator of a boiler having. a supply line and a return line to and from the radiator, means for forcibly circulating water through said lines, a valve in the supply line loaded to resist circulation of the water but permitting forced circulation thereof, said valve having a vent on its inlet side for permitting gas to escape when said valve is closed thereby preventing circulation ofwarm fluid through the valve into the radiator, and means for holding said valve open culation of warm fluid through the valveinto the binatlon with a. radiator of a boiler having a anterior to the valve.

to permit unrestricted circulation radiator. g

9. In a hot water heating system, the combination with a radiator, of a boiler having a supply line and a return line to and from the radiator, means for forcibly circulating the water through said supply and return lines, a valve in said supply line loaded to build up pressure on its inlet side and prevent thermal circulation in the system but permitting forced circulation therethrough, and venting means in said supply line 10.;In a hot water heating system, a boiler wherein wateris heated, means for maintaining the water in' theboiler constantly hot, a radiator, supply and return lines connecting the boiler and radiator to form a hot water circulating system, a pump for intermittently producing forced circulation of the heated water injthe circulating system, a shut off valve in the supply line loaded to prevent thermal circulation of the water butpermitting forced circulation there-- of, and means communicating with the supply line anterior to said valve for accommodating gases liberated in the boiler to prevent such gases from opening said valve and circulating to sai radiator when the pump is inactive.

11.7.5 hot water heating system including in combination a boiler. a radiator, a first pipe from the upper portion of the boilerextending upwardly to the radiator, a second pipe extending from the radiator downwardly to the boiler. a shut off valve in the first pipe loaded to prevent of water to the thermal circulation of the water but permitting 

